Tearing machine of large width for the textile industry

Abstract

The invention comprises a tearing machine of large width. The feeding station is automatic. A centrifugal separator recycles the scraps recovered by the longitudinal pneumatic transport. It recycles them with the new scraps, in the stack with vibrating walls which extends itself over the entire width of the machine. The compartmentalized suction loading devices assure homogeneity of the fibrous cloth. A fibrous cloth of very high quality is produced on an evacuation conveyor belt. This cloth is homogenous over the entire width of the machine, which may extend to several meters.

We claim: 
     
       1. A tearing machine, comprising: a rotary tearing drum having teeth, the rotary drum disposed within a housing and extending a width equal to the tearing machine; and   means for automatically feeding the tearing drum with textile scraps, wherein the automatic feeding means comprises:   a vertical scrap receiving stack;   two approximately vertical walls, at least one of which vibrates, disposed within the receiving stack;   a passage formed in the interior of the vertical walls; and   pneumatic transport piping in communication with the passage, the passage receiving an approximately constant level of the textile scraps from the piping.   
     
     
       2. The tearing machine as defined in claim 1 wherein the vibrating wall of the scrap receiving stack extends approximately the entire width of the housing, and includes means for selectively regulating the amplitude and frequency of the wall vibrations. 
     
     
       3. The tearing machine as defined in claim 1 wherein the approximately vertical walls of the scrap receiving stack both vibrate. 
     
     
       4. The tearing machine as defined in claim 1 further comprising means for recycling recovered textile scraps downstream in the tearing machine. 
     
     
       5. The tearing machine as defined in claim 4 wherein the recycling means comprises a plurality of perforations formed in at least one of the vibrating walls, the one perforated vibrating wall having air flow through it and into an extractor, the extractor being connected to, and in communication with the scrap receiving stack. 
     
     
       6. The tearing machine as defined in claim 1, further comprising: centrifugal separating means, in communication with the pneumatic transport piping, for separating hard and heavy scraps downward and reusable light fibers upward and forward toward an upper part of the scrap receiving stack.   
     
     
       7. The tearing machine as defined in claim 1, further comprising: a conveyor strip having a plurality of perforations, the strip being downstream from the rotary tearing drum;   a suction loading device under the conveyor strip and extending the entire width of the housing; and   an interior space defined by the loading device and divided along the width of the housing into several suction compartments.   
     
     
       8. The tearing machine as defined in claim 7, further comprising: a displaceable transverse bridge disposed above the tearing drum; and   means, attached to the bridge, for sharpening the teeth of the drum over the entire length of the drum.   
     
     
       9. The tearing machine as defined in claim 8 wherein the sharpening means comprises a sharpener having a bushel rotary grindstone. 
     
     
       10. The tearing machine as defined in claim 8 wherein the machine is in a modular form, each module comprising the tearing drum, the perforated conveyor strip and the suction loading device, such that a fibrous cloth produced, successively crosses several modules. 
     
     
       11. The tearing machine as defined in claim 10, further comprising means for successively sharpening the tearing drum teeth of each module. 
     
     
       12. The tearing machine as defined in claim 11, wherein the successive sharpening means comprises two longitudinal rolling stacks disposed beneath the sharpening means. 
     
     
       13. The tearing machine as defined in claim 7 further comprising: means for guiding the perforated conveyor strip;   means for driving the guiding means;   means for suctioning textile scraps; and   a laterally sliding block comprising the perforated conveyor strip, the suction loading device, the guiding means, the driving means, and the suctioning means.